Hi,
the song is by Morris Rosenfeld, a NY Jew who wrote poems about religion and sweatshop experience around the turn of the century (1862-1923).
It is beautiful and heartbreaking. The melody is traditional.

Rosenfeld writes elsewhere:

And if for a moment, forgetting to ponder
On grief and oppression, song breaks out anew,
I hear in his lay only: "Wander and wander!"
And ev'ry note tells me the singer's a Jew.

Ben